/* $OpenBSD: sigsetjmp.S,v 1.6 2013/07/05 21:10:50 miod Exp $ */
/*
 * Copyright (c) 1983, 1993, 1995
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 */

/*
 * C library -- sigsetjmp, siglongjmp
 *
 *      siglongjmp(a,v)
 * will generate a "return(v)" from
 * the last call to
 *      sigsetjmp(a, savemask)
 * by restoring registers from the stack,
 * and dependent on savemask restores the
 * signal mask.
 */

#include "DEFS.h"
#include <machine/setjmp.h>

ENTRY(sigsetjmp, R6)
	movl	4(%ap),%r0		# get env pointer
	movl	8(%ap),(_JBLEN*4)(%r0)	# save "savemask"
	tstl	8(%ap)			# do saving of signal mask?
	beql	L1
	jmp	_C_LABEL(setjmp)+2	# yep, do full setjmp
L1:	jmp	_C_LABEL(_setjmp)+2	# nope, skip to _setjmp

ENTRY(siglongjmp, 0)
	movl	4(%ap),%r0		# get env pointer
	tstl	(_JBLEN*4)(%r0)		# test if "savemask" was set
	beql	L2
	jmp	_C_LABEL(longjmp)+2	# yep, do full longjmp
L2:	jmp	_C_LABEL(_longjmp)+2	# nope, skip to _longjmp


